Hi! I have compile the gui program by QT5.9 (sudo apt install qt5-default). The compiling complete finely at lxqt and debian9:
sudo apt install qt5-default cd program_directory make clean make At lxqt, the binary program runs finely. But lxqt take up too much space, so I need in debian9. But at debian9, running the binary file returns an error: QXcbConnection: Could not connect to display I have made: export DISPLAY=:0.0 sudo apt install libffi-dev phantomjs gksu But the error is still present. Also I can run the gui program at debian9 from another PC by: ssh -X 192.168.X.X -l debian but this doesn't solve the problem. Please help. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/3240f056-8b51-4134-a6bc-3b186e8e2780%40googlegroups.com.